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Control method and device for bidirectional DC-DC converter

A technology of DC-DC and control method, applied in the control field of bidirectional DC-DC converter, can solve the problem that the performance and stability of the bidirectional DC-DC converter cannot be guaranteed, the influence of the internal resistance of the power supply is not considered, and the bidirectional DC-DC conversion problems such as poor stability

Inactive Publication Date: 2018-08-10
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0004] The present invention provides a control method and device for a bidirectional DC-DC converter, which is used to solve the problem that the control of the existing bidirectional DC-DC converter is mainly based on linear sliding mode control, and the traditional linear sliding mode surface is mainly used. The influence of the internal resistance of the power supply on the controller is not considered, and the performance and stability of the bidirectional DC-DC converter cannot be guaranteed, which leads to the technical problem of poor stability of the existing bidirectional DC-DC converter

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  • Control method and device for bidirectional DC-DC converter

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Embodiment Construction

[0054] An embodiment of the present invention provides a control method for a bidirectional DC-DC converter, which is used to solve the problem that the control of the existing bidirectional DC-DC converter is mainly based on linear sliding mode control, and the traditional linear sliding mode surface is mainly used. The influence of the internal resistance of the power supply on the controller is not considered, and the performance and stability of the bidirectional DC-DC converter cannot be guaranteed during operation, which leads to the technical problem of poor stability of the existing bidirectional DC-DC converter.

[0055] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The describ...

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Abstract

Through the introduction of the related parameters of power internal resistance, the invention reduces the impact on the operation stability of a bidirectional DC-DC converter from a condition that aconventional bidirectional DC-DC converter does not give consideration to the power internal resistance, and the fractional power is introduced to a sliding mode control method, thereby enabling a controller to have a nonlinear structure, and enabling the output feedback voltage of the bidirectional DC-DC converter to converge to a reference voltage quickly under the action of a current in a larger range. Moreover, the output feedback voltage can converge in a limited time period, thereby further improving the convergence performance of the output voltage of the bidirectional DC-DC converter.

Description

technical field [0001] The invention relates to the field of virtual synchronous machines, in particular to a control method and device for a bidirectional DC-DC converter. Background technique [0002] The bidirectional DC-DC converter is an important device connecting the energy storage battery and the voltage source inverter with virtual synchronous machine characteristics, which can realize the bidirectional flow of energy between the energy storage battery and the grid. [0003] The control of the existing bidirectional DC-DC converter is mainly based on linear sliding mode control, and the traditional linear sliding mode surface is mainly used. The influence of the internal resistance of the power supply on the controller is not considered, and it is impossible to ensure that the bidirectional DC-DC converter is running The poor performance and stability lead to the technical problem of poor stability of the existing bidirectional DC-DC converter. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/1582H02M1/0006
Inventor 唐酿盛超陈晓科黄辉黄明欣陈迅赵兵
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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